FWIW, I'm planning for a little bit earlier in July than you and I've been a little bit trepid as well regarding the "final 400" vs "easy walkoff" and even the MR couloir. So I have been searching youtube and there's actually a good sampling of people's go-pro videos for these pitches if you can stomach the insipid background music and hi-five-bro-woo!ing (LOL). With all of the fish eye lensing and frame jerkiness inherent to a helmet cam it can be difficult to get a true sense of the incline and exposure, but if you watch enough you can start to gauge how people are moving on the different terrains and get some sense of how it is. You can try searching for "mountaineers route july" or variations on that.
